Here's a summary of the important changes. If you're interested, I'd encourage you to download the draft and look at the summary in the Overview Description, which has links into the relevant parts of the API. This draft contains all the major features that we are planning to add in this version of the API. If there's anything you'd like to see changed, this would be a very good time to let us know *Namespaces and Cascading *Event Service and Notifications *Annotations and Resource Injection *Client Contexts and Localization *Queries
Read Eamonn McManus's post on the subject: http://weblogs.java.net/blog/emcmanus/archive/2007/12/jmx_api_20_earl_1.html